کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7079845 1459994 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biokinetic and molecular studies of methanogens in phased anaerobic digestion systems
ترجمه فارسی عنوان
مطالعات بیولوژیکی و مولکولی متانوژن ها در سیستم های هضم بی هوازی مرحله ای
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
The influence of differing operational conditions of two-stage digesters on biokinetic characteristics and communities of methanogenic archaea was evaluated. Operating temperature of each phase influenced the archaeal communities significantly. Also, a strong correlation was observed between community composition and temperature and pH. The maximum specific substrate utilization rates (kmax) of acetoclastic methanogens in the mesophilic and thermophilic 1st phases were 11.4 and 22.0 mgCOD mgCOD−1 d−1, respectively, whereas significantly lower kmax values were estimated for the mesophilic and thermophilic 2nd-phase digesters which were 7.6 and 16.6 mgCOD mgCOD−1 d−1, respectively. It appeared that the biokinetic characteristics of the acetoclastic methanogen communities were reliant on digester loading rates. Also, higher temperature dependency coefficients (θ) were observed for the long retention time digesters when compared to the values computed for the 1st-phase digesters. Accordingly, the implementation of two sets of biokinetic parameters for acetoclastic methanogen will improve modeling of phased anaerobic digesters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 149, December 2013, Pages 318-326
نویسندگان
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